St Moritz weather in September 2025

Expect 43°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in St Moritz in September. Check more long-term weather averages for St Moritz in September before you book your next holiday to Switzerland in 2025/2026.

  • 43°F maximum daytime temperature in September in St Moritz43
    43°F max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in September in St Moritz15
    15 days with some rainfall
  • 34°F minimum night-time temperature in September in St Moritz34
    34°F min night temperature
  • 13 hours of daylight per day in September in St Moritz13
    13 hours of daylight per day
  • No heat & humidity in September in St Moritz0
    No heat & humidity
  • 5.0 inches monthly rainfall in September in St Moritz5.0
    5.0 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in St Moritz5
    5 (Moderate) UV index

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The September weather guide for Switzerland (St Moritz) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about Switzerland

How cold is it in St Moritz in September?

Daytime temperatures usually reach 43°F in St Moritz in September, falling to 34°F at night.

How sunny is it in St Moritz in September?

There are normally 6 hours of bright sunshine each day in St Moritz in September - that's 47% of daylight hours.

Does it rain in St Moritz in September?

There are usually 15 days with some rain in St Moritz in September and the average monthly rainfall is 5.0 inches.

St Moritz September sunrise & sunset times

Browse the sunrise and sunset times for St Moritz in September 2025. Select a month to view St Moritz sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:41 18:59
Monday, 15th September 2025 05:59 18:32
Tuesday, 30th September 2025 06:18 18:02

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